[JimWright949]

What you can do is use an Atmel AVR to convert the TTL serial port to a I2C bus (Two-wire Serial Interface), then use another Atmel AVR to convert I2C (Two-wire Serial Interface) to TTL for the camera. Then you can hang other things off of the I2C (Two-wire Serial Interface) bus. I use AVRs because there is very little overhead to programming them, about $5 of Radio shack parts.

The AVR can also be used to convert the serial port to an external SPI bus.

-Jim